flash消息有时不会在vue2.js中消失

时间:2017-01-12 12:48:44

标签: vue.js vuejs2

我刚制作了一个flash消息组件,它从eventBus接收flash消息,然后在消失之前显示flash消息3秒钟。该组件如下:

<template>
  <transition name="fade">
    <div v-if="visible" v-bind:class="type" role="alert">{{ message }}</div>
  </transition>
</template>

<style scoped>
  .fade-enter-active, .fade-leave-active {
    transition: opacity .5s
  }
  .fade-enter, .fade-leave-to {
    opacity: 0
  }
</style>

<script>
  import EventBus from '../../config/EventBus';

  export default {
    name: 'flash-view',
    data() {
      return {
        type: '',
        message: '',
        visible: false,
      };
    },
    mounted() {
      EventBus.subscribeFlashMessage(data => this.setData(data));
      setTimeout(() => (
        this.visible = false
      ), 3000);
    },
    methods: {
      setData(data) {
        this.setType(data.type);
        this.message = data.message;
        this.visible = true;
      },
      setType(type) {
        this.type = `alert alert-${type}`;
      },
    },
  };
</script>

该组件适用于第一个闪存消息,但是如果随后触发闪存消息或者如果我更改路由(VueRouter),则闪存消息不会消失。我认为这是因为javascript被重新触发,这会使setTimeout的效果无效,但是我不知道如何在Vue中解决这个问题。

1 个答案:

答案 0 :(得分:0)

由于Belmin Bedak的帮助,我已设法解决了这个问题。现在使用created()而不是mounted()实现以下内容,因为每次更新周期都会重新触发已安装。 Created()设置一次监听器,watch用于检查可见是否已更改(当新事件被推送到监听器时会发生这种情况)。如果更改了visible,则会正确触发setTimeout。

<template>
  <transition name="fade">
    <div
      v-if="visible"
      v-bind:class="type"
      role="alert"
      v-text="message"
    >
    </div>
  </transition>
</template>

<style scoped>
  .fade-enter-active, .fade-leave-active {
    transition: opacity .5s
  }
  .fade-enter, .fade-leave-to {
    opacity: 0
  }
</style>

<script>
  export default {
    name: 'flash-view',
    data() {
      return {
        type: '',
        message: '',
        visible: false,
      };
    },
    created() {
      this.$on('flashMessage', data => this.setData(data));
    },
    methods: {
      setData(data) {
        this.type = `alert alert-${data.type}`;
        this.message = data.message;
        this.visible = true;
      },
      setFadeOut() {
        setTimeout(() => (
          this.visible = false
        ), 2500);
      },
    },
    watch: {
      visible: 'setFadeOut',
    },
  };
</script>